#list {
  margin: 50px auto;
  padding: 0;
  list-style: none;
  width: 600px;
  border: 1px solid #ccc;
}
#list li {
  padding: 10px;
  border-bottom: 1px solid #ccc;
}
#list li a {
  font-size: 14px;
  color: #333;
  text-decoration: none;
}
#list li:last-child {
  border-bottom: 0;
}
#list li:nth-child(odd) {
  background-color: #f5f5f5;
}
#list li:nth-child(even) {
  background-color: #ddd;
}
#list li:hover {
  background-color: #2aabd2;
}
#list li:hover a {
  color: white;
}
.box {
  margin: 60px auto;
  width: 150px;
}
.box span {
  float: left;
  width: 30px;
  height: 30px;
  background-color: #ccc;
  border-radius: 50%;
  margin-right: 10px;
}
.box span:last-child {
  margin-right: 0;
}
.box span.active {
  background-color: #2aabd2;
}
.box::after {
  content: '';
  display: block;
  clear: both;
}
